Lens moving unit and camera module having the same

ABSTRACT

A lens moving unit for a camera module is disclosed. The lens moving unit includes a first lens moving unit, a second lens moving unit, and a cover member to encompass the first and second lens moving units by being coupled to a base. The first lens moving unit moves in response to the interaction between a magnet and a coil. The lens moving unit is configured to miniaturize a camera module and configured to include a handshake correction function for enhancement of operational reliability to simplify an assembly process.

Pursuant to 35 C. §119 (a), this application claims the benefit ofearlier filing date and right of priority to Korean Patent ApplicationNos. 10-2014-0010534, filed on Jan. 28, 2014, 10-2014-0070523, filed onJun. 11, 2014 the contents of which are hereby incorporated by referencein their entirety.

BACKGROUND OF THE DISCLOSURE

1. Field

The teachings in accordance with the exemplary embodiments of thispresent disclosure generally relate to a lens moving unit and a cameramodule having the same.

2. Background

A miniaturized and low power-consuming camera module is difficult to beapplied with a VCM (Voice Coil Motor) technology used for a conventionalcamera module, and therefore researches have been briskly waged to copewith the difficulty mentioned above.

A camera module mounted on a small electronic device such as a smartphone may be frequently applied with a shock during use and may beminutely shaken by a user handshake during photographing. Thus,development for a technology to additionally install handshake shakecorrection means has been recently required. The handshake shakecorrection means are variably researched.

One of the handshake shake correction technologies that corrects thehandshake by moving an optical module to x, y axes corresponding to aplane perpendicular to an optical axis suffers from disadvantages suchas complex structure and inadequacy to miniaturization, because anoptical system must be moved and adjusted within the plane perpendicularto the optical axis for image correction.

SUMMARY

The present disclosure has been made to solve the foregoingdisadvantages of the prior art and therefore an object of certainembodiments of the present disclosure is to provide a lens moving unitconfigured to miniaturize a camera module and configured to include ahandshake correction function for enhancement of operationalreliability, and a camera module having the same.

Another object of certain embodiments of the present disclosure is toprovide a lens moving unit configured to simplify an assembly processand a camera module having the same.

The present disclosure is to solve at least one or more of the aboveproblems and/or disadvantages in whole or in part and to provide atleast advantages described hereinafter.

In order to achieve at least the above objects, in whole or in part, andin accordance with the purposes of the present disclosure, as embodiedand broadly described, and in one general aspect of the presentinvention, there is provided a lens moving unit, the lens moving unitcomprising:

-   -   a first lens moving unit including a bobbin mounted at an inner        side with at least one lens and formed at a periphery with a        first coil, and a housing configured to support a magnet        arranged at a surrounding of the bobbin to move the bobbin and        the first coil to a first direction parallel with an optical        axis in response to interaction between the magnet and the first        coil; and    -   a second lens moving unit including a base spaced apart at a        predetermined distance from the bobbin and the first lens moving        unit, a support member configured to movably support the first        lens moving unit to second and third directions relative to the        base and to supply an electric power to the first coil, and a        circuit board including a detection sensor configured to detect        positions of the second and third directions of the second lens        moving unit relative to a second coil and the base opposite to        the magnet of the first lens moving unit to thereby move an        entire first lens moving unit including the bobbin to the        mutually different second and third directions which is        perpendicular to the optical axis in response to the interaction        between the magnet and the second coil.

Preferably, but not necessarily, the lens moving unit may furthercomprise a cover member configured to encompass the first and secondlens moving units by being coupled to the base.

Preferably, but not necessarily, the bobbin may include a first stopperprotrusively formed at an upper surface with a first height, and asecond stopper protrusively formed at a lateral surface of an uppersurface to a circumferential direction, wherein the first stopperprevents an inner surface of the cover member from colliding with abobbin body, and the second stopper prevents the bobbin from collidingwith the base.

Preferably, but not necessarily, the housing may include a first surfacemounted with four magnets, a second surface configured to interconnectwith the first surface and arranged with the support member, a thirdstopper protrusively formed from an upper surface to preventinterference with the cover member, and a fourth stopper protrusivelyformed from a floor surface to prevent interference with the base.

Preferably, but not necessarily, the second surface may include anescape groove to prevent the support member from interfering with thehousing.

Preferably, but not necessarily, the second surface may further includea staircase unit formed at an upper side of the escape groove.

Preferably, but not necessarily, the second surface may further includea diaphragm configured to accommodate damping silicon.

In another general aspect of the present disclosure, there is provided alens moving unit, the unit comprising:

-   -   a first lens moving unit including a bobbin mounted at an inner        side with at least one lens and formed at a periphery with a        first coil, and a housing configured to support a magnet        arranged at a surrounding of the bobbin to move the bobbin and        the first coil to a first direction parallel with an optical        axis in response to interaction between the magnet and the first        coil;    -   a second lens moving unit including a base spaced apart at a        predetermined distance from the housing, a support member        configured to movably support the first lens moving unit to        second and third directions relative to the base and to supply        an electric power to the first coil, a second coil arranged        opposite to the magnet of the first lens moving unit, and a        circuit board including a detection sensor configured to detect        a position of the first direction of the housing relative to the        base by detecting a sensing magnet mounted on the first lens        moving unit and changes in magnetic field of the sensing magnet        to thereby move the housing to the mutually different second and        third directions which is perpendicular to the optical axis in        response to the interaction between the magnet and the second        coil; and;    -   a cover member configured to encompass the first and second lens        moving units by being coupled to the base.

Preferably, but not necessarily, the lens moving unit may furthercomprise a second detection sensor configured to detect positions of thesecond and third directions.

Preferably, but not necessarily, the second coil may include a pluralityof circuit boards coupled to an inner lateral wall of the cover member.

Preferably, but not necessarily, the first lens moving unit may includean octagonal bobbin having at least four straight surfaces and cornersurfaces configured to connect the at least four straight surfaces, afirst coil wound on a periphery of the bobbin, a magnet arranged at aposition opposite to the straight surface of the first coil, a housingfixed by the magnet, and upper and bottom elastic members, an innerframe of which is coupled to the bobbin and an outer frame of which iscoupled to the housing.

Preferably, but not necessarily, the housing may include a recess groovehaving a size corresponding to that of the second stopper at a positionopposite to that of the second stopper.

Preferably, but not necessarily, the support member may be integrallyformed with the upper elastic member.

Preferably, but not necessarily, the support member may include aconnection unit connected to the upper elastic member, first and secondelastic deformation units extensively formed from the connection unit,and a fixation unit fixedly coupled to the base.

Preferably, but not necessarily, at least four support members may beprovided to support the second lens moving unit, and at least twosupport members further include terminal units each having a differentpolarity.

Preferably, but not necessarily, the support member may be interposedbetween the first and second elastic deformation units and may furtherinclude a damping connection unit formed in a space formed by thediaphragm.

Preferably, but not necessarily, upper side and bottom side shapes ofthe first and second elastic deformation units may mutually correspond,while the first and second elastic deformation units are interposedbetween the damping connection unit.

Preferably, but not necessarily, each of the first and second elasticdeformation units may take a shape of a wire free from pattern.

Preferably, but not necessarily, the fixation unit may be wider thaneach width of the first and second elastic deformation units.

Preferably, but not necessarily, the base may be concavely formed with asupport member recess groove at a position opposite to that of thesupport member.

Preferably, but not necessarily, the support member recess groove may beformed at four corner areas of the base.

Preferably, but not necessarily, the second coil may be formed at anupper surface of the circuit board mounted at an upper side of the base.

Preferably, but not necessarily, the second coil may be provided at anupper surface of the circuit board mounted at an upper surface of thebase with a substrate having a pattern coil, and coupled to the circuitboard in the form of lamination.

Preferably, but not necessarily, the second coil may be integrallyformed at an upper surface of the base in the form of a surfaceelectrode.

Preferably, but not necessarily, the detection sensor may be any one ofa Hall sensor aligned with a center of the second coil and insertedlycoupled to a detection sensor recess groove formed at the base and aphoto reflector.

Preferably, but not necessarily, a total of two detection sensors may beprovided, where each imaginary line connecting a center of the base toeach center of the detection sensors is perpendicularly arranged.

Preferably, but not necessarily, the magnet may be dual-purposely usedas an auto focusing magnet configured to move the bobbin to the firstdirection and as a handshake correction magnet configured to move thehousing to the second and third directions.

Preferably, but not necessarily, the second coil may be formed at aninner surface of the circuit board mounted at an inner lateral surfaceof the cover member.

Preferably, but not necessarily, the second coil may be provided at anupper surface of the circuit board mounted at an inner lateral surfaceof the cover member with a substrate having a pattern coil, and may becoupled to the circuit board in the form of lamination.

Preferably, but not necessarily, the second coil may be integrallyformed at an inner lateral surface of the cover member in the form of asurface electrode.

Preferably, but not necessarily, the second detection sensor may be anyone of a Hall sensor aligned with a center of the second coil andinsertedly coupled to a detection sensor recess groove formed at thebase and a photo reflector.

Preferably, but not necessarily, the sensing magnet may be arranged atan upper surface of the first lens moving unit.

Preferably, but not necessarily, at least one sensing magnet may bearranged at a corner area of the upper surface of the bobbin.

In still another general aspect of the present disclosure, there isprovided a camera module, the camera module comprising:

-   -   an image sensor;    -   a PCB mounted with the image sensor; and    -   a lens moving unit.

ADVANTAGEOUS EFFECTS

The present disclosure can advantageously provide a lens moving unitcapable of miniaturizing a camera module by a reduced height andincluding a handshake correction function capable of improving anoperational reliability.

Furthermore, the lens moving unit according to the present disclosurecan advantageously improve assemblage by elastically supporting ahousing mounted with a plurality of sheets of lenses through integratedsupport member formed by bending a part of an upper elastic member freefrom assembly of separate support member.

Still another advantageous effect is that a damping unit capable ofreducing a minute vibration generated from a support member is providedto enable a more stable handshake correction control.

Still further advantageous effect is that modularization is implementedby installing a circuit board mounted at an inner lateral surface of acover member with a second coil to further simplify an assembly process.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the disclosure and are incorporated in and constitute apart of this application, illustrate embodiment(s) of the disclosure andtogether with the description serve to explain the principle of thedisclosure. In the drawings:

FIG. 1 is a schematic perspective view illustrating a lens moving unitaccording to an exemplary embodiment of the present invention;

FIG. 2 is an exploded: perspective view of FIG. 1;

FIG. 3 is a perspective view removed of a cover member of FIG. 1;

FIG. 4 is a perspective view illustrating a bobbin according to anexemplary embodiment of the present disclosure;

FIGS. 5 and 6 are a perspective view and a rear perspective viewillustrating a housing according to an exemplary embodiment of thepresent disclosure;

FIG. 7 is a rear perspective view illustrating a housing coupled by abobbin and a bottom elastic member according to a first exemplaryembodiment of the present disclosure;

FIG. 8 is a plane view illustrating an initial state of an upper elasticmember according to a first exemplary embodiment of the presentdisclosure;

FIG. 9 is a perspective view illustrating a state where the upperelastic member is divided into first and second upper elastic membersaccording to a first exemplary embodiment of the present disclosure;

FIG. 10 is an enlarged view of A part of FIG. 3;

FIGS. 11 and 12 are perspective views illustrating a state where a base,a circuit board and a second coil are separated according to a firstexemplary embodiment of the present disclosure;

FIG. 13 is a plane view illustrating a coupled relationship of a secondcoil coupled to a circuit board according to a first exemplaryembodiment of the present disclosure;

FIG. 14 is a schematic view illustrating a floor surface of a baseaccording to a first exemplary embodiment of the present disclosure;

FIG. 15 is a cross-sectional view taken along line I-I′ of a lens movingunit of FIG. 3;

FIG. 16 is a cross-sectional view taken along line II-II′ of a lensmoving unit of FIG. 3;

FIG. 17 is a cross-sectional view taken along line of a lens moving unitof FIG. 3;

FIG. 18 is a schematic perspective view illustrating a lens moving unitaccording to a second exemplary embodiment of the present disclosure;

FIG. 19 is an exploded perspective view of FIG. 18;

FIG. 20 is an enlarged view of a support member of FIG. 19;

FIG. 21 is a schematic perspective view illustrating a housing accordingto a second exemplary embodiment of the present disclosure;

FIG. 22 is an exploded perspective view illustrating a cover memberassembly according to a second exemplary embodiment of the presentdisclosure;

DETAILED DESCRIPTION

Various exemplary embodiments will be described more fully hereinafterwith reference to the accompanying drawings, in which some exemplaryembodiments are shown. The present inventive concept may, however, beembodied in many different forms and should not be construed as limitedto the example embodiments set forth herein. Rather, these exemplaryembodiments are provided so that this description will be thorough andcomplete, and will fully convey the scope of the present inventiveconcept to those skilled in the art.

Hereinafter, a lens moving unit according to a first exemplaryembodiment of the present disclosure will be described in detail withreference to the accompanying drawings.

FIG. 1 is a schematic perspective view illustrating a lens moving unitaccording to an exemplary embodiment of the present invention, FIG. 2 isan exploded perspective view of FIG. 1, FIG. 3 is a perspective viewremoved of a cover member of FIG. 1, FIG. 4 is a perspective viewillustrating a bobbin according to an exemplary embodiment of thepresent disclosure, FIGS. 5 and 6 are a perspective view and a rearperspective view illustrating a housing according to an exemplaryembodiment of the present disclosure, FIG. 7 is a rear perspective viewillustrating a housing coupled by a bobbin and a bottom elastic memberaccording to a first exemplary embodiment of the present disclosure,FIG. 8 is a plane view illustrating an initial state of an upper elasticmember according to a first exemplary embodiment of the presentdisclosure, FIG. 9 is a perspective view illustrating a state where theupper elastic member is divided into first and second upper elasticmembers according to a first exemplary embodiment of the presentdisclosure; FIG. 10 is an enlarged view of A part of FIG. 3, FIGS. 11and 12 are perspective views illustrating a state where a base, acircuit board and a second coil are separated according to a firstexemplary embodiment of the present disclosure, FIG. 13 is a plane viewillustrating a coupled relationship of a second coil coupled to acircuit board according to a first exemplary embodiment of the presentdisclosure, FIG. 14 is a schematic view illustrating a floor surface ofa base according to a first exemplary embodiment of the presentdisclosure, FIG. 15 is a cross-sectional view taken along line I-I′ of alens moving unit of FIG. 3, FIG. 16 is a cross-sectional view takenalong line II-II′ of a lens moving unit of FIG. 3, and FIG. 17 is across-sectional view taken along line of a lens moving unit of FIG. 3.

Meantime, a rectangular coordinate system (x, y, and z) may be used forFIGS. 1˜17. x axis and y axis in the drawings are defined as planes eachperpendicular to an optical axis, where an optical axis direction (zdirection) is called as a first direction, x axis direction is called asa second direction and y axis direction is called as a third directionfor convenience sake.

A handshake correction device applied to a small-sized camera module ina mobile device such as a smart phone or a tablet PC is a deviceconfigured to prevent an outline of a photographed image from beingblurred due to vibration generated by handshake of a user duringphotographing of a stationary image. Furthermore, an auto focusingdevice is a device configured to automatically capture a focus of animage of an object on an image sensor surface. The handshake correctiondevice and the auto focusing device may be variably configured, and thehandshake correction and auto focusing devices according to exemplaryembodiments of the present disclosure can perform auto focusing andhandshake correction operations by moving an optical module formed witha plural sheet of lenses to a surface perpendicular to an optical axis.

Referring to FIGS. 1 and 2, a lens moving unit according to an exemplaryembodiment of the present disclosure may include a first lens movingunit (100) and a second lens moving unit (200). At this time, the firstlens moving unit (100) may be a lens moving unit for auto focusing, andthe second lens moving unit (200) may be a lens moving unit forhandshake correction. Referring to FIGS. 2 and 3, the first lens movingunit (100) may include a bobbin (110), a first coil (120), a magnet(130) and a housing (140).

The bobbin (110) may be reciprocally mounted to a direction parallel toan optical axis in an inner space of the housing (140). The bobbin (110)may be formed at a periphery with a first coil (120, described later) toenable an electronic interaction with the magnet (130). Furthermore, thebobbin (110) may perform an auto focusing function by being electricallysupported by upper and bottom elastic members (150, 160) to move to thefirst direction parallel to the optical axis.

Although not illustrated in the drawings, the bobbin (110) may includetherein a lens barrel (not shown) mounted with at least one. lens. Thelens barrel may be variably coupled to an inner side of the bobbin(110). For example, an inner circumferential surface of the bobbin (110)may be formed with a female screw thread, and a periphery of the lensbarrel may be formed with a male screw thread corresponding to thefemale screw thread, and the lens barrel can be coupled to the bobbin(110) by the screw connection of the female and male screw threads.

The present disclosure is not limited thereto, and instead of forming ascrew thread at an inner circumferential surface of the bobbin (110),the lens barrel may be directly fixed to an inside of the bobbin (110)by other methods than the screw connection. Alternatively, one or moresheets may be integrally formed with the bobbin (110) free from the lensbarrel. The optical system may be formed with one sheet of lens or twoor more sheets of lenses coupled to the lens barrel. Meantime, thebobbin (110) may include a first stopper (111) and/or a second stopper(112).

The first stopper (111) can prevent an upper side surface of the bobbin(110) body from directly colliding with an inner lateral surface of thecover member (300, illustrated in FIGS. 1 and 15), even if the bobbin(110) moves over a regulated scope due to outside shock when the bobbin(110) moves to the first direction parallel to the optical axis forperforming the auto focusing function. Furthermore, the first stopper(111) may also function to guide an installation position of the upperelastic member (150).

Referring to FIG. 4, a plurality of first stoppers (111) according tothe exemplary embodiment of the present disclosure may be protrusivelyformed upwards each at a first height (h1), where at least four firststoppers (111) may be protrusively formed in a shape of a polygonalpillar. The first stopper (111) may be symmetrically provided relativeto a center of the bobbin (110), and may be also provided in anon-symmetrical structure where interference with the other parts isruled out as illustrated in FIG. 4.

The second stopper (112) can prevent a floor surface of the bobbin (110)body from directly colliding with a base (210, illustrated in FIGS. 2and 16) and an upper surface of a circuit board (250) even if the bobbin(110) moves over a regulated scope due to outside shock when the bobbin(110) moves to the first direction parallel to the optical axis forperforming the auto focusing function. Furthermore, the second stopper(112) may be protrusively formed at a corner area of the bobbin (110) toa circumferential direction, and the housing (140) may be formed at aposition opposite to that of the second stopper (112) with a recessgroove (146).

When a mutually-contacted state of the second stopper (112) and a floorsurface (146 a, see FIG. 5) of the recess groove (146) is configured asan initial position, the auto focusing function may be performed in sucha manner that the bobbin (110) lifts up when a current is supplied tothe first coil (120) as in the single direction control of theconventional VCM, and the bobbin (120) lifts down when the current isturned off.

When a configuration is provided as an initial position where the secondstopper (112) and the floor surface (146 a, see FIG. 5) of the recessgroove (146) are mutually spaced apart at a predetermined distance, theauto focusing function may be performed in such a manner that control ismade in response to a current direction as a bi-directional control inthe conventional VCM, and the bobbin (120) moves to an upward directionor a downward direction perpendicular to the optical axis. For example,a forward current is supplied, the bobbin (110) may move upwards, andwhen a backward current is supplied, the bobbin (110) may movedownwards.

Meantime, the recess groove (146) of the housing (140) corresponding tothe second stopper (112) is concavely formed with a second width (w2){corresponding to a first width (w1)} having a predetermined allowancefrom the first width (w1) of the second stopper (112), the secondstopper (112) may be restricted from rotating inside the recess groove(146). Then, the second stopper (112) can prevent the bobbin (110) fromrotating even if the bobbin (112) rotates to a direction about anoptical axis, instead of an optical direction.

Furthermore, an upper surface and a bottom surface of the bobbin (110)may be protrusively formed with a plurality of upper support protrusions(113) and a plurality of bottom support protrusions (114, see FIG. 7).Referring to FIG. 3, the upper support protrusion (113) may be providedin a cylindrical shape or an angular pillar shape, and may couple andfix an inner lateral frame (151) of the upper elastic member (150) tothe bobbin (110). A first through hole (151 a) may be formed at aposition opposite to that of the upper support protrusion (113) of theinner lateral frame (151) according to an exemplary embodiment of thepresent disclosure.

At this time, the upper support protrusion (113) and the first throughhole (151 a) may be fixed by thermal bonding or may be fixed by anadhesive member such as an epoxy. Furthermore, as illustrated in FIGS. 3and 4, a plural number of upper support protrusions (113) may be formed.At this time, a distance between the upper support protrusions (113) maybe adequately arranged within a scope avoidable of interference ofadjacent parts. That is, each upper support protrusion (113) may besymmetrically spaced apart from the other at a predetermined distanceabout the bobbin (110), or may be symmetrically formed about aparticular imaginary line passing a center of the bobbin (110).

Now, referring to FIG. 7, the bottom support protrusion (114) may beprovided in a cylindrical shape or an angular pillar shape like theupper support protrusion (113), and may couple and fix an inner lateralframe (161) of the bottom elastic member (160) to the bobbin (110). Asecond through hole (161 a) may be formed at a position opposite to thatof the bottom support protrusion (114) of the inner lateral frame (161)according to an exemplary embodiment of the present disclosure.

At this time the bottom support protrusion (114) and the second throughhole (161 a) may be fixed by thermal bonding or may be fixed by anadhesive such as an epoxy. Furthermore, as illustrated in FIG. 7, aplural number of bottom support protrusions (114) may be formed. At thistime, a distance between the bottom support protrusions (114) may beadequately arranged within a scope avoidable of interference of adjacentparts. That is, each bottom support protrusion (114) may besymmetrically spaced apart from the other at a predetermined distanceabout the bobbin (110).

Meantime, as illustrated in FIG. 7, the number of bottom supportprotrusions (114) may be smaller than that of the upper supportprotrusions (113), which is due to the different shapes between theupper elastic member (150) and the bottom elastic member (160).

That is, as illustrated in FIG. 4, each of the upper elastic members(150) must be formed in a mutually bisected electrically non-connectedstructure to allow each member to function as a terminal for applying acurrent to the first coil (120) and a sufficient number of upper supportprotrusions (113) is fixedly provided to prevent the Upper elasticmembers (150) from incompletely coupled with the bobbin (110).

Meanwhile, as illustrated in FIG. 6, the bottom elastic member (160) isformed in one body to allow stable coupling even with only a fewernumber of bottom support protrusions (114) than that of the upperelastic member (150). Furthermore, in contrary to the exemplaryembodiment, each of the bottom elastic members (160) may be formed in amutually bisected electrically non-connected structure to allow eachmember to function as a terminal for applying a current to the firstcoil (120), where the upper elastic members (150) may be formed in onebody.

Furthermore, two winding protrusions (115) may be provided at an upperperipheral surface of the bobbin (110). The winding protrusion (115) maybe respectively wound by both distal ends of the first coil (120), wherea conductible connection with a pair of solder units (157) provided atthe upper elastic member (150) can be realized. The winding protrusion(115) may be arranged in a pair at a horizontally symmetrical positionabout the bobbin (110).

Furthermore, the soldering coupling of the first coil (120) wound on thewinding protrusion (115) at the solder unit (157) also functions totightly couple the inner lateral frame (151) of the upper elastic member(150) to an upper side surface of the bobbin (110) without any floating.A distal end of the winding protrusion (115) may be formed with astaircase (115 a) to prevent both end lines of the wound first coil(120) from being separated. The first coil (120) may be provided in aring-shaped coil block insertedly coupled to a periphery of the bobbin(110). However, the present disclosure is not limited thereto, and thefirst coil (120) may be directly wound on the periphery of the bobbin(110).

In the exemplary embodiment of the present disclosure, the first coil(120) may be formed in an approximately octagonal shape, the shape ofwhich corresponds to that of the periphery of the bobbin (110), wherethe bobbin (120) may be also provided in an octagonal shape.Furthermore, the first coil (120) may be provided with at least foursurfaces with a straight line, and a corner area connecting the foursurfaces may be round or straight. At this time, a part formed with astraight line may be a surface opposite to the magnet (130).

Furthermore, a surface of the magnet (130) opposite to the first coil(120) may have a same curvature as that of the first coil (120). Thatis, when the first coil (120) is a straight line, a surface of themagnet (130) opposite to the first coil (120) may be a straight line,and when the first coil (120) is a curved line, a surface of the magnet(130) opposite to the first coil (120) may be a curved line. Furthermoreeven if the first coil (120) is a curved line, a surface of magnet (130)opposite to the first coil (120) may be a straight line, and vice versa.

The first coil (120) performs an auto focusing function by moving thebobbin (110) to a direction parallel with the optical axis, and when acurrent is supplied to the magnet (130), an electromagnetic force can beformed through interaction with the magnet (130) and the formedelectromagnetic force can move the bobbin (110).

Meantime, the first coil (120) may be formed opposite to the magnet(130), and when the magnet (130) is formed in one body to allow anentire surface opposite to the first coil (130) to have a same polarity,the first coil (130) may also have the same polarity at a surfaceopposite to the magnet (130). Meantime, although not described, when themagnet (130) is bisected at a surface perpendicular to the optical axisto allow a surface opposite to the first coil (130) to be divided to twoor more sections, the first coil (130) may also be divided in the numbercorresponding to that of divided magnet (130).

The magnet (130) may be mounted at a position opposite to that of thefirst coil (130). In the exemplary embodiment of the present disclosure,the magnet (130) may be installed at a position corresponding to that ofthe first coil (120) of the housing (140) as illustrated in FIG. 2. Themagnet (130) may be configured in one body, and the magnet (130)according to the exemplary embodiment of the present disclosure may bearranged with an N pole at a surface opposite to the first coil (120)with an S pole at an outside surface. The present disclosure is notlimited thereto, and the reverse is also possible. Furthermore, asexplained above, the magnet (130) may be bisected on a plain surfaceperpendicular to the optical axis.

At least two magnets (130) may be installed and four magnets (130) maybe installed according to the exemplary embodiment of the presentdisclosure. At this time, the magnet (130) may be formed in a shape of arectangular parallelepiped each surface having a predetermined width,and a broad surface may be installed on each lateral surface of thehousing (140). At this time, the mutually opposite magnets (130) may beinstalled on a parallel base.

Furthermore, the magnet (130) may be arranged to face the first coil(120). At this time, each surface on which the magnet (130) and thefirst coil (120) face each other may be arranged in a plain surface tobe mutually parallel. The present disclosure is not limited thereto, andany one surface of the magnet (130) and the first coil (120) may have aplain surface, and another surface may be formed in a curved surface.Alternatively, all surfaces surface on which the magnet (130) and thefirst coil (120) face each other may be arranged in a curved surface. Atthis time, curvatures of surfaces on which the magnet (130) and thefirst coil (120) face each other may be same.

When the magnet (130) is arranged in the shape of a rectangularparallelepiped as illustrated, one pair of a plurality of magnets (130)may be parallel arranged to the second direction, and the other pair ofmagnets may be arranged to the third direction, whereby the movingcontrol of the housing (140) for handshake correction (described later)can be made possible.

The housing (140) may be formed in an approximately square shape, andmay be formed an approximately in an octagonal shape as illustrated inFIG. 5 according to the exemplary embodiment of the present disclosure.At this time, the housing (140) may include a first surface (141) and asecond surface (142). The first surface (141) may be a surface mountedwith the magnet (130) and the second surface may be a surface mountedwith a support member (220, described later).

The first surface (141) may be formed flat, and may be formed equal toor greater than that of the magnet (130). At this time, the magnet (130)may be fixed to a magnet recess unit (141 a) formed at an inner surfaceof the first surface (141). The magnet recess unit (141 a) may be formedwith a concave groove corresponding in size to the magnet (130), and maybe arranged at least at four surfaces opposite to the magnet (130). Atthis time, a floor surface of the magnet recess unit (141 a), that is, asurface opposite to the second coil (230, described later), is formedwith an opening (141 b) to allow a floor surface of the magnet (130) todirectly face the second coil (230). Meantime, the magnet (130) may besecured to the magnet recess unit (141 a) using an adhesive. However,the present disclosure is not limited thereto, and may be fixed using anadhesive member such as a double-sided tape.

Alternatively, it may be possible to form the magnet recess unit (141 a)of a window-shaped recess hole from which a part of the magnet can beexposed or in which a part of the magnet can be inserted, instead offorming the magnet recess unit (141 a) in a concave groove asillustrated in FIG. 5. Meantime, an upper surface of the first surface(141) may be formed with an adhesive agent inlet hole (141 c) configuredto infuse epoxy for fixation. According the exemplary embodiment of thepresent disclosure, the adhesive agent inlet hole (141 c) may beprovided in a tapering cylindrical shape to infuse an adhesive agentthrough an exposed upper surface of the housing (140).

The housing (140) may be protrusively formed at an upper surface with aplurality of third stoppers (143). The third stopper (143) serves toprevent the cover member (300, described later) from colliding with thehousing (140) body, where the upper surface of the housing (140) isprevented from directly colliding with an inner lateral surface of thecover member (300) when there is generated an external shock.Furthermore, the third stopper (143) also functions to guide aninstallation position of the upper elastic member (150). To this end,the upper elastic member (150) may be formed with a guide groove (155)having a shape corresponding to that of the third stopper (143) at aposition opposite to that of the third stopper (143).

Meanwhile, the first surface (141) may be arranged in parallel with alateral surface of the cover member (300, described later). Furthermore,the first surface (141) may be formed to have a greater surface thanthat of the second surface (142).

Furthermore, referring to FIGS. 5 and 6, the second surface (142) may beconcavely formed with an escape groove (142 a) having a predetermineddepth. At this time, the escape groove (142 a) may be formed at a floorsurface with an opening to prevent a fixation part of bottom lateralunit at the support member (220, described later) from interfering withthe housing (140). Furthermore, as illustrated in FIG. 6, the escapegroove (142 a) may be formed at an upper side with a staircase (142 b)to support an inner side of an upper lateral part of the support member(220).

Now, referring to FIGS. 3, 5 and 6, the housing (140) may beprotrusively formed at an upper side with a plurality of upper framesupport protrusions (144) coupled by an external frame (152) of theupper elastic member (150), At this time, the number of upper framesupport protrusions (144) may be greater than that of upper supportprotrusion (113), which is because a length of the external frame (152)is longer than that of the inner frame (151). Meantime, the externalframe (152) opposite to the upper frame support protrusion (144) may beformed with a third through hole (152 a) having a shape correspondingthereto, where the external frame (152) is fixed by adhesive agent orheat fusion.

Furthermore, the housing (140) may be formed at a bottom side with aplurality of bottom frame support protrusions (145) coupled by anexternal frame (162) of the bottom elastic member (160). At this time,the number of bottom frame support protrusion (145) may be greater thanthat of bottom support protrusion (114), which is because a length ofthe external frame (162) of bottom elastic member (160) is longer thanthat of the inner frame (161). Meantime, the external frame (162)opposite to the bottom frame support protrusion (145) may be formed witha fourth through hole (162 a) having a shape corresponding thereto,where the external frame (162) is fixed by adhesive agent or heatfusion.

Furthermore, the housing (140) may be protrusively formed at a bottomsurface with a fourth stopper (147). The fourth stopper (147) serves toprevent a floor surface of the housing (140) from colliding with thebase (210, described later) and/or the circuit board (150). The fourthstopper (147) may also maintain a predetermined distance from the base(210) and/or the circuit board (150) during an initial operation andnormal operation, whereby the housing (140) can be distanced downwardlyfrom the base (210) and upwardly distanced from the cover member (300)to maintain an optical axis directional height using a support member(220, described later) free from vertical interference. Thus, thehousing (140) can perform a shifting operation second and thirddirections which are front, rear, left and right directions on a planeparallel with the optical axis. This operation will be re-describedlater in more details.

Meantime, lift-up and/or lift-down operations to a direction parallelwith the optical axis of the bobbin (110) may be elastically supportedby the upper and bottom elastic members (150, 160). At this time, theupper and bottom elastic members (150, 160) may be provided in leafsprings.

Referring to FIGS. 3 and 7, the upper and bottom elastic members (150,160) may include inner frames (151, 161) coupled to the bobbin (110),external frames (152, 162) coupled to the housing (140) and connectionunits (153, 163) connecting the inner and external frames (151, 161,152, 162). The connection units (153, 163) may be bent at least once toform a predetermined shape of pattern. The lift-up and/or lift-downoperation of the bobbin (110) to the first direction parallel with theoptical axis can be elastically supported by position change and finedeformation of the connection units (153, 163).

In the present exemplary embodiment, the upper elastic member (150) maybe divided to a bisected first upper elastic member (150 a) and secondupper elastic member (150 b), as illustrated in FIG. 9. The first upperelastic member (150 a) and second upper elastic member (150 b) of theupper elastic member (150) can be applied with mutually differentpolarities by the bisected structure. That is, as illustrated in FIGS. 3and 8, a solder unit (157) is provided at a position opposite to that ofa pair of winding protrusions (115) wound by both distal ends of thefirst coil (120) after the inner frames (151) and the external frames(152) are respectively coupled to the bobbin (110) and the housing(140), where the first upper elastic member (150 a) and second upperelastic member (150 b) can be applied with mutually different polaritiesby the solder unit (157) configured to perform a conductive connectionusing solder and the like.

At this time, the external frame (152) of the upper elastic member (150)is provided with at least two cut-off pieces (154) to form a one bodilymanufactured, assembly-completed upper elastic member (150) to bisectedstructure. At this time, both distal ends (154 a, 154 b) of the cut-offpiece (154) may be formed with a narrower width than that of theexternal frame (152) to enable easy cut-off. The both distal ends (154a, 154 b) of the cut-off piece (154) thus formed enable an assemblyoperator to clearly and visually ascertain a cut-out position of theexternal frame (152), whereby cut-out can be conveniently performedusing a cutting tool. Furthermore, unlike the exemplary embodiment, thecut-out pieces (154) are not formed and mutually separated first andsecond upper elastic members are separately formed to allow beingcoupled to the bobbin (110) and the housing (140).

Meanwhile, according to the exemplary embodiment of the presentdisclosure, a corner area of the upper elastic member (150) may beintegrally formed with the support member (220) to allow the supportmember (220) to be bent to a direction parallel with an optical axisbefore or after the assembly step as shown in FIG. 8. However, thepresent disclosure is not limited thereto, and the support member (220)may be formed as a separate member from the upper elastic member (150).When the support member (220) is formed as a separate member, thesupport member (220) may be formed with a leaf spring, a coil spring, asuspension wire and any member capable of elastically supporting theupper elastic member (150).

Meantime, the upper and bottom elastic member (150, 160), the bobbin(110) and the housing (140) may be assembled by a bonding operationusing heat fusion and/or adhesive agent. At this time, the fixingoperation may be finished by bonding using an adhesive agent afterfixation using heat fusion according to assembly order.

For example, when the bobbin (110) and the inner frame (161) of thebottom elastic member (150) are initially assembled, and then thehousing (140) and the external frame (162) of the bottom elastic member(160) are secondly assembled, the bottom support protrusion (114) of thebobbin (110), the second through hole (164 a) coupled thereto and thefourth through hole (162 a) coupled to the bottom frame supportprotrusion (145) of the housing (140) may be fixed by heat fusion.Thirdly, when the bobbin (110) and the inner frame (151) of the upperelastic member (150) are initially assembled, the upper supportprotrusion (113) of the bobbin (110) and the first through hole (151 a)coupled thereto may be fixed by heat fusion. Lastly and fourthly, whenthe housing (140) and the external frame (152) of the upper elasticmember (150) are fixed, the third through hole (152 a) coupled to theupper frame support protrusion (144) of the housing (140) may be bondedby coating using an adhesive agent such as epoxy and the like.

However, these assembly orders may be changed. That is, the first tothird fixing assembly processes of may be performed by heat fusion andthe last and fourth step of fixing process may be performed by bonding.This is because there may be involve with deformation such as twist atthe time of heat fusion, and the last step can complement thedeformation by bonding.

Particularly, as mentioned above, in view of the fact that the upperelastic member (150) is provided with a bisected structure, the numberof upper support protrusions (113) may be formed greater than that ofthe bottom support protrusions (114) to prevent a floating phenomenonthat may be generated at the time of separation of the upper elasticmember (150).

The second lens moving unit (200), which is a handshake correction lensmoving unit, may include a first lens moving (100), a base (210), asupport member (220), a second coil (230) and a position detectionsensor (240), and may further include a circuit board (250).

The first lens moving unit (100) may be configured as mentioned above,and may be replaced with an optical system configured to realize an autofocusing function using other methods than the above configuration. Thatis, instead of using the auto focusing actuator of VCM method, the firstlens moving unit (100) may be configured with an optical system using asingle lens moving actuator or an actuator of reflectiveindex-changeable method. That is, the first lens moving unit (100) maybe used by any optical actuator capable of performing an auto focusingfunction. However, there may be a requirement that a magnet (130) beinstalled at a position opposite to that of the second coil (230).

Referring to FIGS. 11 to 14, the base (210) may take an approximatesquare shape, and include the support member (220) at four corner areas.The base (210) may be provided with a plurality of first groove parts(211) configured to inject an adhesive agent therein when fixing thecover member (300) using an adhesive agent. At least one first groovepart (211) may be formed at a surface not opposite to that of a terminalsurface (250 a) of the circuit board (250, described later). A surfaceopposite to that of the terminal surface (250 a) of the base may beformed with a terminal surface support groove (210 a) having a sizecorresponding to that of the terminal surface (250 a). The terminalsurface support groove (210 a) may be concavely and inwardly formed froma periphery of the base (210) at a predetermined depth to prevent theterminal surface (250 a) from protruding to outside or to adjust aprotruding amount.

Furthermore, the base (210) is formed at a circumferential surface witha staircase (210 b) to guide the cover member (300) coupled to an upperside of the staircase (210 b), and may be coupled to allow a distal endof the cover member to be surface-contacted. At this time, distal endsof the staircase (210 b) and the cover member (300) may be bonded, fixedand sealed using an adhesive agent.

The base (210) may be protrusively formed at an upper surface with aplurality of guide protrusions (212), where the guide protrusion may beprovided as a first guide protrusion (212 a) and/or a second guideprotrusion (212 b). The first guide protrusion (212 a) and the secondguide protrusion (212 b) may be changed in positions if necessary. Theinwardly arranged first guide protrusion (212 a) may guide a designposition of the circuit board (250), and the second guide protrusion(212 b) may guide an inner circumferential surface of the second coil(230).

In the present exemplary embodiment, a total of four second coils (230)may be provided, and a total of eight guide protrusions (212) may beprovided including the first and second guide protrusions (212 a, 212b). That is, the first and second guide protrusions (212 a, 212 b) may,in a pair, guide the circuit board (250) and the second coil (230).Furthermore, each of the first and second guide protrusions (212 a, 212b) may guide the circuit board (250) and/or the second coil (230)according to design.

Furthermore, the base (210) may be concavely formed at an upper surfacewith a support member recess groove (214) configured to insert thesupport member (220) thereinto. The support member recess groove (214)may be coated with an adhesive agent to fix the support member (220)lest the support member (220) be moved. The support member recess groove(214) may be inserted and fixed by a distal end of the support member(220).

Furthermore, the base (210) may be provided at an upper surface with adetection sensor recess groove (215) arrangeable with the detectionsensor (240). In the present exemplary embodiment, a total of twodetection sensor recess grooves (215) may be provided, where thedetection sensor (240) is arranged at the detection sensor recess groove(215) to detect the degree of movement of the first lens moving unit(100) to the second and third directions. To this end, two detectionsensor recess grooves (215) may be arranged to allow an angle formed byan imaginary line connecting a center of the detection sensor recessgroove (215) and a center of the base to be at 90°.

At least one surface of the detection sensor recess grooves (215) may beformed with a tapered-off inclined surface (215 a) to facilitate asmooth injection of epoxy for assembling the detection sensor (240).Furthermore, the detection sensor recess grooves (215) may not beinjected a separate epoxy, but the epoxy may be injected to fix thedetection sensor (215). A position of the detection sensor recessgrooves (215) may be at a center of the second coil (230) or may be neara center of the second coil (230). Alternatively, a center of the secondcoil (230) may match a center of the detection sensor (240).

Meanwhile, as illustrated in FIG. 14, a recess unit (260) mounted with afilter (not shown) may be formed at a border area at a bottom surface ofthe base (210). The filter may be an UV filter. However, the presentdisclosure is not limited thereto, and a filter may be arranged at therecess unit (260) of the base (210) using a separate sensor holder (notshown) as a medium. Furthermore, the recess unit (260) of the base (210)may be coupled by a sensor substrate (not shown) mounted with an imagesensor (not shown) to constitute a camera module.

Referring to FIGS. 3 and 10, the support member (220) may be coupled tothe base (210) by being bent at the assembly step while being integrallyformed at four corner areas of the upper elastic member (150). A distalend of the support member (220) may be inserted into the support memberrecess groove (214) to be fixed by epoxy and the like.

According to the present exemplary embodiment, four support members(220) may be formed as the support members (220) are formed at fourcorner areas of the upper elastic member (150). However, the presentdisclosure is not limited thereto, and a total of eight support members(220) may be formed when two support members (220) are formed at eachcorner area of the upper elastic member (150). The support member (220)according to the exemplary embodiment may include a connection unit(221), elastic deformation units (222, 223), a fixation unit (224) and adamping connection unit (225), and at least two support members (220)out of the four support members (220) may include a terminal unit (226).

The connection unit (221), which is a unit configured to connect with acorner surface of the upper elastic member (150), may be centrallyformed with a through hole (221 a) to allow performing a bending work atleft and right sides of the through hole (221 a), whereby the supportmember (220) can be easily bent with a smaller force to form theconnection unit. The shape of the connection unit (221) is not limitedthereto, and any shape may be allowable as long as the connection unitis bendable even without a through hole. Furthermore, when the supportmember (220) is formed as a member separate from the upper elasticmember (150), the connection unit (221) may be a part where the supportmember (220) and the upper elastic member (150) are electricallyconnected.

The elastic deformation units (222, 223) may be provided by being bentat least once to form a predetermined shape of a pattern. According tothe present exemplary embodiment, the elastic deformation unit may beformed as first and second elastic deformation units (222, 223) via thedamping connection unit (225), and also may be formed as mutuallycorresponding shapes. For example, as illustrated in FIG. 10, when thefirst elastic deformation unit (222) is provided in an N shape formedwith a straight unit to a direction parallel with an optical axisthrough four times of bending, the second elastic deformation unit (223)may be also formed in a corresponding shape as that of the first elasticdeformation unit. The N shape is a simple example, and other patternsincluding a zigzag shape may be also possible. At this time, the firstand second elastic deformation units (222, 223) may be formed in oneunit instead of two separate units, and may be also formed as apattern-less suspension wire.

The first and second elastic deformation units (222, 223) may beminutely deformed to a direction the housing (140) moves when thehousing (140) moves to the second and third directions perpendicular tothe optical axis. Then, the housing (140) can move only to the secondand third directions which are plain surfaces perpendicular to theoptical axis with almost no position change relative to the firstdirection which is a direction parallel with the optical axis, wherebyaccuracy of handshake correction can be enhanced.

The fixation unit (224) may be provided at a distal end of the supportmember (220). Furthermore, the fixation unit (224) may be provided in aplate shape wider than that of the elastic deformation units (222, 223).The present disclosure is riot limited thereto and the fixation unit(224) may have a width equal to or narrower than that of the elasticdeformation units (222, 223). The fixation unit (224) may be insertedinto the support member recess groove (214) of the base (210) and may befixed and coupled by adhesion member such as epoxy. However, the presentdisclosure is not limited thereto, and the fixation unit (224) may bepress-fitted into the support member recess groove (214) by forming thefixation unit (224) to match to the support member recess groove (214)formation-wise.

The damping connection unit (225) may be arranged in the middle of theelastic deformation units (222, 223) and a distal end of the dampingconnection unit (225) may be arranged at a space part (S) formed via adiaphragm (227) formed at the housing (140). Furthermore, the dampingconnection unit (225) may be arranged at any position of the supportmember (220) between the connection unit (221) and the fixation unit(224).

The space part (S) may be formed by three surfaces formed by a floorsurface of the base (210), the diaphragm (227) and a lateral wall of thehousing (140), and the damping connection unit (225) arranged in thespace part (S) may be coated with silicone for damping. At this time,the silicone is coated after inclining the housing (140) to allow thethree surfaces to be positioned downwards at the silicone coating step,whereby the silicone is prevented from flowing down. Furthermore, thesilicone may be so made as to maintain a gel state in order to allow thedamping connection unit (225) to be in an incompletely fixed state.Thus, the damping connection unit (225) may move little by little inresponse to the movement of the elastic deformation units (222, 223) toallow absorbing a minute vibration transmitted from the elasticdeformation units (222, 223).

In the present exemplary embodiment, the damping connection unit (225)may be formed in a hook shape, where a distal end thereof can climb overthe diaphragm 227). The present disclosure is not limited thereto, andthe damping connection unit (225) may be formed in a straight line to bearranged at a space part side.

As noted above, the upper elastic member (150) may be divided to abisected first upper elastic member (150 a) and second upper elasticmember (150 b). Thus, a terminal unit (226) may be provided to supply anelectric power to the first upper elastic member (150 a) and secondupper elastic member (150 b). The terminal unit (226) may be formed onlyat two members of the four support members (220), because the terminal(226) only needs a positive (+) electric power or a negative electric(−).

Referring to FIG. 10, the terminal unit (226) may be formed by bendingat least once a plate-shaped member extended from the fixation unit(224). The terminal unit (226) may be conductively connected to a pad(256) provided at the PCB (250) using a soldering method and the like.To this end, a surface of the terminal unit (226) and a surface of thepad (256) may be arranged to face each other. At this time, the terminalunit (226) and the pad (256) may surface-contact each other, and asillustrated in FIG. 10, a conductive member like a solder may beinterposed between the terminal unit (226) and the pad (256). Thesupport member (220) can supply an electric power of mutually differentpolarities to the upper elastic member (150) through the couplingbetween the terminal unit (226) and the pad (256), whereby a fixationpower towards the base (210) of the support member (220) can besimultaneously increased.

The second coil (230) may be arranged to face the magnet (130) fixed atthe housing (140). For example, the second coil (230) may be arranged atan external side of the magnet (130). Alternatively, the second coil(230) may be spaced apart from downward side of the magnet (130) at apredetermined distance. In the present exemplary embodiment, a total offour second coils (230) may be installed at four surfaces. However, thepresent disclosure is not limited thereto, and only one for seconddirection and one for third direction may be installed, and four or moresecond coils may be installed.

Furthermore, the second coil (230) may be formed by winding adoughnut-shaped wire, and as illustrated in FIG. 13, a start line (231)and an end line (232) of the second coil (230) may be conductivelyconnected to a terminal (252) formed on the circuit board (250). Thesecond coil (230) may be installed at an upper surface of the circuitboard (250) arranged at an upper side of the base (210). However, thepresent disclosure is not limited thereto, and the second coil (230) maybe tightly connected to the base (210), may be spaced apart from thebase (210) at a predetermined distance, or may be formed on a separatesubstrate, where the substrate may be stacked on the circuit board(250).

In the present exemplary embodiment, the second coil (230) may be guidedin installation position thereof by first and second guide protrusions(212 a, 212 b) protrusively formed on an upper surface of the base(210).

The detection sensor (240) may be arranged at a center of the secondcoil (230) to detect the movement of the housing (140). The detectionsensor (240) may be provided as a Hall sensor, and any sensor may beused for the detection sensor (240) as long as it can detect a change inmagnetic force. The detection sensor (240) may be mounted at a bottomsurface of the circuit board (250), where the mounted detection sensor(240) may be inserted into a detection sensor recess groove (215) formedat the base (210). The bottom surface of the circuit board (250) may bean opposite surface of a surface arranged with the second coil (230).

The circuit board (250) may be coupled to an upper surface of the base(210), and may be guide in installation position by the first guideprotrusion (212 a) as described above. The circuit board (250) may beformed with at least one bent terminal surface (250 a). In the presentexemplary embodiment, the circuit board is formed with two bent terminalsurfaces (250 a). The terminal surface (250 a) may be arranged with aplurality of terminals (251) to supply a current to the first and secondcoils (120, 230) by receiving an external electric power. The number ofterminals formed on the terminal surface (250 a) may be increased ordecreased depending on types of elements necessary for control.Meantime, according to the present exemplary embodiment, the PCB may bereplaced with an FPCB (Flexible PCB). The present disclosure however isnot limited thereto, and the terminal of the circuit board (250) may bedirectly formed on a surface of the base (210) by using a surfaceelectrode method.

Furthermore, the circuit board (250) may be formed with an escape groove(254) to pass therethrough one of the start line (231) and the end line(232) of the second coil (230). The escape groove (254) may be formedwith a space for passing a line extracted from an inner lateral surfaceof the second coil (230) out of the start line (231) and the end line(232) of the second coil (230). The inner lateral surface of the secondcoil (230) may be a surface contacted by the second coil (230) and thecircuit board (250). That is, as illustrated in FIG. 13, one of thestart line (231) and the end line (232) of the second coil (230) may beextracted from the floor surface of the second coil (230). However, whenthe start line (231) is extracted from a periphery of the second coil(230), the end line (232) may be extracted from an inner surface of thesecond coil (230).

At this time, in view of the fact that the end line (232) is alsoextracted from the floor surface of the second coil (230), when the endline (232) is extracted from the inner surface of the second coil (230)to the outside, the end line (232) must pass through the floor surfaceof the second coil (230). Thus, when the end line (232) is extractedfrom the floor surface of the second coil (230), the second coil (230)may not be horizontally installed because of thickness of the end line.Thus, the escape groove (254) may be formed on the circuit board (250)in a predetermined shape to allow an entire floor surface of the secondcoil (230) to always surface-contact an entire surface of aninstallation surface, whereby a space unit is made to be formed at afloor surface side near a distal end of the second coil (230) as high asa height of the escape groove (254). Then, the end line (232) may passthe space unit to be extracted to outside of the second coil (230).

The circuit board (250) may be installed near a corner with a pad (256)conductively connected to the terminal unit (226) provided at thesupport member (220). The pad (256) made of a conductive material isformed at an upper surface of an angled portion of the corner of thecircuit board (250) may be connected to an electric circuit (not shown)inside the circuit board (250), or may be connected to two leader linesof the first coil (120). Meanwhile, two corners of the four corners ofthe circuit board (250) may be formed with the pad (256), and theremaining two corners may be free from the pad (256). The cornerportions of no pads (256) may still maintain the angle shape, but mayform chamfered corners as illustrated in FIG. 12.

Meanwhile, the detection sensor (240) may be arranged at a center sideof the second coil (230) with the circuit board (250) being situatedtherebetween. That is, the detection sensor (240) may not be directlyconnected to the second coil (230), but the second coil (230) may beformed at an upper surface of the circuit board (250) and the detectionsensor may be formed at a bottom surface of the circuit board (250).According to the present exemplary embodiment, the detection sensor(240), the second coil (230) and the magnet (130) may be preferablyarranged on a same axis, whereby the second coil (230) may move thehousing (140) to the second and third directions to perform thehandshake correction function.

The cover member (300) may be formed in an approximate box shape, andmay encompass the first and second lens moving units (100, 200). At thistime, as illustrated in FIG. 1, the cover member (300) may be formed ata position opposite to that of the first groove part (211) of the base(210) with a second groove unit (310), and a groove unit of apredetermined area may be formed by coupling of the first and secondgroove parts (211, 310). The groove unit may be coated with an adhesivemember having a viscosity. That is, the adhesive member coated on thegroove unit can fill up a gap formed by opposite surfaces of the covermember (300) and the base (210) using the groove unit, whereby the covermember (300) and the base (210) may be coupled to be sealed together.

Furthermore, a surface opposite to the terminal surface (250 a) of thecircuit board (250) at the cover member (300) may be formed with a thirdgroove unit (320) to prevent interference with the plurality ofterminals (251) formed at the terminal surface (250 a). The third grooveunit (320) may be concavely formed on an entire surface opposite to theterminal surface (250 a), and the adhesive member may be inwardly coatedto seal the cover member (300), the base (140) and the circuit board(250).

Meanwhile, the first, second and third groove parts (211, 310, 320) maybe respectively formed at the base (140) and the cover member (300).However, the present disclosure is not limited thereto, and a similarshape to that of the first, second and third groove parts (211, 310,320) may be formed only on the base (140) or only on the cover member(300).

Meanwhile, as illustrated in FIG. 14, the base (140) may be formed at abottom surface with a concave groove part (270) on which a filter (notshown) may be installed. Furthermore, an image sensor (not shown) may bearranged between the PCB (not shown) and the groove part (270). A cameramodule may be formed by assembling a lens barrel (not shown) to thebobbin (110). Alternatively, the base (210) may further include aseparately-formed image sensor holder (not shown) at a bottom surfacethereof. Furthermore, the base may be downwardly extended to directlycouple an image sensor-mounted camera module substrate (not shown) to afloor surface side. Furthermore, the camera module may be applied to amobile device such as a mobile phone.

Thus, according to the abovementioned configuration, the magnet (130)may be shared to realize the auto focusing operation and the handshakecorrection operation of the first and second lens moving units (100,200) to reduce the number of parts and to enhance the responsiveness byreducing the weight of the housing (140). Of course, an auto focusingmagnet and a handshake correction magnet may be separately formed.Furthermore, the support member (220) may be integrally formed with theupper elastic member (150), and bent to reduce the weight and to enhancethe assemblage. Furthermore, an outside minute vibration transmitted tothe support member (220) may be absorbed by using silicone, whereby amore accurate handshake correction control can be accomplished.

Next, a second exemplary embodiment of the present disclosure will bedescribed in detail with reference to the accompanying drawings.

FIG. 18 is a schematic perspective view illustrating a lens moving unitaccording to a second exemplary embodiment of the present disclosure,FIG. 19 is an exploded perspective view of FIG. 18, FIG. 20 is anenlarged view of a support member of FIG. 19, FIG. 21 is a schematicperspective view illustrating a housing according to a second exemplaryembodiment of the present disclosure, and FIG. 22 is an explodedperspective view illustrating a cover member assembly according to asecond exemplary embodiment of the present disclosure.

Referring to FIGS. 18 and 19, the lens moving unit according to thesecond exemplary embodiment of the present disclosure may include afirst lens moving unit (400) and a second lens moving unit (500). Atthis time, the first lens moving unit (400) may be a lens moving unitfor auto focusing, and the second lens moving unit (500) may be a lensmoving unit for handshake correction. Referring to FIGS. 19 and 20, thefirst lens moving unit (400) may include a bobbin (410), a first coil(420), a magnet (430) and a housing (440).

The bobbin (410) may be reciprocally mounted to a direction parallel toan optical axis in an inner space of the housing (440). The bobbin (410)may be formed at a periphery with a first coil (420, described later) toenable an electronic interaction with the magnet (430). Furthermore, thebobbin (410) may perform an auto focusing function by being electricallysupported by upper and bottom elastic members (450, 460) to move to thefirst direction parallel to the optical axis.

Although not illustrated in the drawings, the bobbin (410) may includetherein a lens barrel (not shown) mounted with at least one lens. Thelens barrel may be variably coupled to an inner side of the bobbin(410). For example, an inner circumferential surface of the bobbin (410)may be formed with a female screw thread, and a periphery of the lensbarrel may be formed with a male screw thread corresponding to thefemale screw thread, and the lens barrel can be coupled to the bobbin(410) by the screw connection of the female and male screw threads.

The present disclosure is not limited thereto, and instead of forming ascrew thread at an inner circumferential surface of the bobbin (410),the lens barrel may be directly fixed to an inside of the bobbin (410)by other methods than the screw connection. Alternatively, one or moresheets of lenses may be integrally formed with the bobbin (410) freefrom the lens barrel. The optical system may be formed with one sheet oflens or two or more sheets of lenses coupled to the lens barrel.

Furthermore, an upper surface and a bottom surface of the bobbin (410)may be protrusively formed with a plurality of upper support protrusions(413) and a plurality of bottom support protrusions (414). Referring toFIG. 3, the upper support protrusion (413) may be provided in acylindrical shape or an angular pillar shape, and may couple and fix aninner lateral frame (451) of the upper elastic member (450) to thebobbin (410). A first through hole (451 a) may be formed at a positionopposite to that of the upper support protrusion (413) of the innerlateral frame (451) according to the second exemplary embodiment of thepresent disclosure.

At this time, the upper support protrusion (413) and the first throughhole (451 a) may be fixed by thermal bonding or may be fixed by anadhesive member such as an epoxy. Furthermore, as illustrated, the uppersupport protrusion (413) may be provided in a plural number. At thistime, a distance between the upper support protrusions (413) may beadequately arranged within a scope avoidable of interference of adjacentparts. That is, each upper support protrusion (413) may be symmetricallyspaced apart from the other at a predetermined distance about the bobbin(410), or albeit the spaced-apart distance not being constant, eachupper support protrusion (413) may be symmetrically formed about aparticular imaginary line passing a center of bobbin (410).

Now, referring to FIG. 19, a bottom support protrusion may be providedin a cylindrical shape or an angular pillar shape like the upper supportprotrusion (413), and may couple and fix an inner lateral frame (461) ofthe bottom elastic member (460) to the bobbin (410). A second throughhole (461 a) may be formed at a position opposite to that of the bottomsupport protrusion of the inner lateral frame (461) according to anexemplary embodiment of the present disclosure.

At this time, the bottom support protrusion and the second through hole(461 a) may be fixed by thermal bonding or may be fixed by an adhesivemember such as an epoxy. Furthermore, the bottom support protrusion maybe provided in a plural number. At this time, a distance between thebottom support protrusions may be adequately arranged within a scopeavoidable of interference of adjacent parts. That is, each bottomsupport protrusion (113) may be symmetrically spaced apart from theother at a predetermined distance about the bobbin (410).

Meantime, as illustrated in FIG. 19, the number of bottom supportprotrusion may be smaller than that of the upper support protrusions(413), which is due to the different shapes between the upper elasticmember (450) and the bottom elastic member (460). That is, asillustrated in FIG. 19, each upper elastic member (450) must be formedin a mutually bisected electrically non-connected structure to alloweach member to function as a terminal for applying a current to a firstcoil (420) and a sufficient number of upper support protrusions (413) isfixedly provided to prevent the upper elastic members (450) fromincompletely coupled with the bobbin (410).

Meanwhile, as illustrated in FIG. 19, the bottom elastic member (460) isformed in one body to allow stable coupling even with only a fewernumber of bottom support protrusions than that of the upper elasticmember (450). Furthermore, in contrary to the second exemplaryembodiment, each of the bottom elastic members (460) may be formed in amutually bisected electrically non-connected structure to allow eachmember to function as a terminal for applying a current to the firstcoil (420), where the upper elastic members (450) may be formed in onebody.

Furthermore, two winding protrusions (415) may be provided at an upperperipheral surface of the bobbin (410). The winding protrusion (415) maybe respectively wound by both distal ends of the first coil (420), wherea conductible connection with a pair of solder units provided at theupper elastic member (450) can be realized. The winding protrusion (415)may be arranged in a pair at a horizontally symmetrical position aboutthe bobbin (410).

Furthermore, the soldering coupling of the first coil (420) wound on thewinding protrusion (415) at the solder unit also functions to tightlycouple the inner lateral frame (451) of the upper elastic member (450)to an upper side surface of the bobbin (410) without any floating.

The first coil (420) may be provided in a ring-shaped coil blockinsertedly coupled to a periphery of the bobbin (410). However, thepresent disclosure is not limited thereto, and the first coil (420) maybe directly wound on the periphery of the bobbin (410).

In the second exemplary embodiment of the present disclosure, the firstcoil (420) may be formed in an approximately octagonal shape, asillustrated in FIG. 19, the shape of which corresponds to that of theperiphery of the bobbin (410), where the bobbin (410) may be alsoprovided in an octagonal shape. However, the structure is not limitedthereto, and any structure coupleable to the bobbin (410) may beacceptable. Furthermore, the first coil (420) may be provided with atleast four surfaces with a straight line, and a corner area connectingthe four surfaces may be round or straight. At this time, a part formedwith a straight line may be a surface opposite to the magnet (430).

Furthermore, a surface of the magnet (430) opposite to the first coil(420) may have a same curvature as that of the first coil (420). Thatis, when the first coil (420) is a straight line, a surface of themagnet (430) opposite to the first coil (420) may be a straight line,and when the first coil (420) is a curved line, a surface of the magnet(430) opposite to the first coil (420) may be a curved line. Furthermoreeven if the first coil (420) is a curved line, a surface of magnet (430)opposite to the first coil (420) be a straight line, and vice versa.

The first coil (420) performs an auto focusing function by moving thebobbin (410) to a direction parallel with the optical axis, and when acurrent is supplied to the magnet (430), an electromagnetic force can beformed through interaction with the magnet (430) and the formedelectromagnetic force can move the bobbin (410).

Meantime, the first coil (420) may be correspondingly formed to themagnet (430), and when the magnet (430) is formed in one body to allowan entire surface opposite to the first coil (420) to have a samepolarity, the first coil (420) may also have the same polarity at asurface opposite to the magnet (430). Meantime, although not described,when the magnet (430) is bisected at a surface perpendicular to theoptical axis to allow a surface opposite to the first coil (420) to bedivided to two or more sections, the first coil (420) may also bedivided in the number corresponding to that of divided magnet (430).

The magnet (430) may be mounted at a position opposite to that of thefirst coil (420). In the second exemplary embodiment of the presentdisclosure, the magnet (430) may be installed at a positioncorresponding to that of the first coil (420) of the housing (140) asillustrated in FIG. 2. The magnet (430) may be configured in one body,and the magnet (430) according to the second exemplary embodiment of thepresent disclosure may be arranged with an N pole at a surface oppositeto the first coil (420) with an S pole at an outside surface. Thepresent disclosure is not limited thereto, and the reverse is alsopossible. Furthermore, as explained above, the magnet (430) may bebisected on a plain surface perpendicular to the optical axis.

At least two magnets (430) may be installed and four magnets (430) maybe installed according to the second exemplary embodiment of the presentdisclosure. At this time, the magnet (430) may be formed in a shape of arectangular parallelepiped each surface having a predetermined width,and a broader surface may be installed on each lateral surface of thehousing (440). At this time, the mutually opposite magnets (430) may beinstalled on a parallel base. Furthermore, the magnet (430) may bearranged to face the first coil (420). At this time, each surface onwhich the magnet (430) and the first coil (420) face each other may bearranged in a plain surface to be mutually parallel. The presentdisclosure is not limited thereto, and any one surface of the magnet(430) and the first coil (420) may have a plain surface, and anothersurface may be formed in a curved surface. Alternatively, all surfacessurface on which the magnet (430) and the first coil (420) face eachother may be arranged in a curved surface. At this time, curvatures ofsurfaces on which the magnet (430) and the first coil (420) face eachother may be same.

When the magnet (430) is arranged in the shape of a rectangularparallelepiped as illustrated, one pair of a plurality of magnets (430)may be parallel arranged to the second direction, and the other pair ofmagnets may be arranged to the third direction, whereby the movingcontrol of the housing (140) for handshake correction (described later)can be made possible.

The housing (440) may be formed in an approximately square shape, andmay be formed in an approximately octagonal shape as illustrated in FIG.19 according to the second exemplary embodiment of the presentdisclosure. At this time, the housing (440) may include a first surface(441) and a second surface (442). The first surface (441) may be asurface mounted with the magnet (430) and the second surface may be asurface mounted with a support member (520, described later).

The first surface (441) may be formed flat, and may be formed equal toor greater than that of the magnet (430) according to the secondexemplary embodiment. At this time, the magnet (430) may be fixed to amagnet recess unit (441 a) formed at an inner surface of the firstsurface (441). The magnet recess unit (441 a) may be formed with aconcave groove corresponding in size to the magnet (430), and may bearranged with at least four surfaces opposite to the magnet (430). Atthis time, a floor surface of the magnet recess unit (441 a), that is, asurface opposite to the second coil (530, described later), is formedwith an opening to allow a floor surface of the magnet (430) to directlyface the second coil (530). Meantime, the magnet (430) may be secured tothe magnet recess unit (441 a) using an adhesive. However, the presentdisclosure is not limited thereto, and may be fixed using an adhesivemember such as a double-sided tape.

Alternatively, instead of forming the magnet recess unit (441 a) in aconcave groove, it may be possible to form the magnet recess unit (441a) in a window shape from which a part of the magnet can be exposed orin which a part of the magnet can be inserted. Meantime, an uppersurface of the first surface (441) may be formed with an adhesive agentinlet hole configured to infuse epoxy for fixation. According the secondexemplary embodiment of the present disclosure, the adhesive agent inlethole may be provided in a tapering cylindrical shape to infuse anadhesive agent through an exposed upper surface of the housing (440).Meanwhile, the first surface (441) may be arranged in parallel with alateral surface of the cover member (300, described later). Furthermore,the first surface (441) may be formed to have a greater surface thanthat of the second surface (442).

Furthermore, the housing (440) may be protrusively formed at an upperside with a plurality of upper frame support protrusions (444) coupledby an external frame (452) of the upper elastic member (450), At thistime, the number of upper frame support protrusions (444) may be greaterthan that of upper support protrusion (413), which is because a lengthof external frame (452) is longer than that of inner frame (451).Meantime, the external frame (452) opposite to the upper frame supportprotrusion (444) may be formed with a third through hole having a shapecorresponding thereto, where the external frame (452) may be fixed byadhesive agent or heat fusion.

Furthermore, the housing (140) may be formed at a bottom side with aplurality of bottom frame support protrusions (445) coupled by anexternal frame (462) of the bottom elastic member (460). At this time,the number of bottom frame support protrusions (445) may be greater thanthat of bottom support protrusion, which is because a length of theexternal frame (462) of bottom elastic member (460) is longer than thatof the inner frame (461).

Meantime, lift-up and/or lift-down operations to a direction parallelwith the optical axis of the bobbin (410) may be elastically supportedby the upper and bottom elastic members (450, 460). At this time, theupper and bottom elastic members (450, 460) may be provided in leafsprings.

The upper and bottom elastic members (450, 460) may include inner frames(451, 461) coupled to the bobbin (410), external frames (452, 462)coupled to the housing (440) and connection units (453, 463) connectingthe inner and external frames (451, 461, 452, 462). The connection units(453, 463) may be bent at least once to form a pattern of apredetermined shape. The lift-up and/or lift-down operation of thebobbin (410) to the first direction parallel with the optical axis canbe elastically supported by position change and fine deformation of theconnection units (453, 463).

Meanwhile, according to the second exemplary embodiment of the presentdisclosure, a corner area of the upper elastic member (450) may beintegrally formed with the support member (520) to allow the supportmember (520) to be bent to a direction parallel with an optical axisbefore or after the assembly step as shown in FIG. 2. However, thepresent disclosure is not limited thereto, and the support member (520)may be formed as a separate member from the upper elastic member (450).When the support member (520) is formed as a separate member, thesupport member (520) may be formed with a leaf spring, a coil spring, asuspension wire and any member capable of elastically supporting theupper elastic member (450).

Meantime, the upper and bottom elastic member (450, 460), the bobbin(410) and the housing (440) may be assembled by a bonding operationusing heat fusion and/or adhesive agent. At this time, the fixingoperation may be finished by bonding using an adhesive agent afterfixation using heat fusion according to assembly order.

The second lens moving unit (500), which is a handshake correction lensmoving unit, may include a first lens moving (400), a base (510), asupport member (520), a second coil (530), a circuit board (550) and acover member (600), and may further include a second detection sensor(540), where two second detection sensors (540) may be arranged on thecircuit board to detect x/y two directions.

That is, as illustrated in FIG. 22, the second detection sensor (540)may be arranged near a center of the second coil (530), and at least twosecond detection sensors (540) may be installed on an orthogonalizedsurface to detect z/y two directions. At this time, the second detectionsensor (540) may be arranged on a second coil-mounted surface, and maybe arranged on an opposite surface thereto. An installation position ofthe second detection sensor (540) may be so formed as not to interferewith the second coil (530).

The first lens moving unit (400) may be configured as mentioned above,and may be replaced with an optical system configured to realize an autofocusing function using other methods than the above configuration. Thatis, instead of using the auto focusing actuator of VCM method, the firstlens moving unit (400) may be configured with an optical system using asingle lens moving actuator or an actuator of reflectiveindex-changeable method. That is, the first lens moving unit (400) maybe used by any optical actuator capable of performing an auto focusingfunction. However, there may be a requirement that a magnet (430) beinstalled at a position opposite to that of the second coil (530).

The base (510) may take an approximately square shape, and include thesupport members (520) at four corner areas. The base (510) may beprovided with a plurality of first groove parts (511) configured toinject an adhesive agent therein when fixing the cover member (600)using an adhesive agent. At least one first groove part (511) may beformed at a surface not opposite to that of a terminal surface of thecircuit board (550, described later). A surface opposite to that of theterminal surface of the base (510) may be formed with a terminal surfacesupport groove having a size corresponding to that of the terminalsurface. The terminal surface support groove may be concavely andinwardly formed from a periphery of the base (510) at a predetermineddepth to prevent the terminal surface from protruding to outside or toadjust a protruding amount.

Furthermore, the base (510) may be formed at a circumferential surfacewith a staircase to guide the cover member (600) coupled to an upperside of the staircase, and may be coupled to allow a distal end or thecover member to be surface-contacted. At this time, the staircase andthe cover member (600) may be bonded, fixed and sealed using an adhesiveagent.

The base (510) may be concavely formed at an upper surface with asupport member recess groove to insert the support member (520)thereinto. The support member recess groove may be coated with anadhesive agent to prevent the support member (520) from moving. Asillustrated, the support member (520) may be bent to be coupled to thebase (510) while being integrally configured at four corners of theupper elastic member (450). A distal end of the support member (520) maybe inserted into the support member recess groove and fixed by anadhesive member like epoxy.

According to the second exemplary embodiment, a total of four supportmembers (520) may be formed as the support members (520) are formed atfour corner areas of the upper elastic member (450). However, thepresent disclosure is not limited thereto, and a total of eight supportmembers (520) may be formed when two support members (520) are formed ateach corner area of the upper elastic member (450). Referring to FIG.20, the support member (520) according to the second exemplaryembodiment may include connection unit (521) connected to the upperelastic member (450), elastic deformation units (522, 523) and afixation unit (524), and at least two support members (520) out of thefour support members (520) may include a terminal unit (526).

The connection unit (521), which is a unit connected by a corner surfaceof the upper elastic member (450), may be centrally formed with athrough hole (521 a) to allow performing a bending work at left andright sides of the through hole (521 a), whereby the support member(520) can be easily bent with a smaller force. The shape of theconnection unit (521) is not limited thereto, and any shape may beallowable as long as the connection unit is bendable even without athrough hole. Furthermore, when the support member (520) is formed as amember separate from the upper elastic member (450), the connection unit(521) may be a part where the support member (520) and the upper elasticmember (450) are electrically connected.

The elastic deformation units (522, 523) may be provided by being bentat least once to form a pattern of a predetermined shape. According tothe second exemplary embodiment, the elastic deformation unit mayinclude first and second elastic deformation units (522, 523), eachhaving a corresponding shape. When the first elastic deformation unit(522) is provided in an N shape formed with a straight unit to adirection parallel with an optical axis through two times of bending,the second elastic deformation unit (523) may be also formed in acorresponding shape as that of the first elastic deformation unit (522).The N shape is a simple example, and other patterns including a zigzagshape may be also possible. At this time, the first and second elasticdeformation units (522, 523) may be formed in one unit instead of twoseparate units, and may be also formed as a pattern-less suspensionwire.

Furthermore, it would be acceptable as long as the base (510) and thesupport member (520) can be coupled, and a groove coupled to the supportmember (520) may not be formed at the base (510).

The first and second elastic deformation units (522, 523) may beminutely deformed to a direction of the moving housing (440) when thehousing (440) moves to the second and third directions perpendicular tothe optical axis. Then, the housing (440) can move only to the secondand third directions which are plain surfaces perpendicular to theoptical axis with almost no position change relative to the firstdirection which is a direction parallel with the optical axis, wherebyaccuracy of handshake correction can be enhanced, where thecharacteristic of the elastic deformation unit (522) extendable to alengthwise direction is utilized for the accuracy.

The fixation unit (524) may be provided at a distal end of the supportmember (520). Furthermore, the fixation unit (524) may be provided in aplate shape wider than that of the elastic deformation units (522, 523).The present disclosure is not limited thereto and the fixation unit(524) may have a width equal to or narrower than that of the elasticdeformation units (522, 523). The fixation unit (524) may be insertedinto the support member recess groove of the base (510) and may be fixedand coupled by adhesive member such as epoxy. However, the presentdisclosure is not limited thereto, and the fixation unit (524) may bepress-fitted into the support member recess groove (514) by forming thefixation unit (524) to match to the support member recess grooveformation-wise.

The terminal unit (526) may be formed by bending at least once aplate-shaped member extended from the fixation unit (524). The terminalunit (526) may be conductively connected to a pad (556) provided at thePCB (550) using a soldering method and the like. To this end, a surfaceof the terminal unit (526) and a surface of the pad (556) may bearranged to face each other. At this time, the terminal unit (526) andthe pad (556) may surface-contact each other, and as illustrated, aconductive member like a solder may be interposed between the terminalunit (526) and the pad (556) spaced apart at a predetermined distance.The support member (520) can supply an electric power of mutuallydifferent polarities to an upper elastic member (450) side through thecoupling between the terminal unit (526) and the pad (556), whereby afixation power towards the base (510) of the support member (520) can besimultaneously increased.

Furthermore, the terminal unit (526) may be integrally formed with theupper elastic member (450), or may be electrically connected to theupper elastic member (450) even if separated from the upper elasticmember (450). The terminal unit (526) may be electrically connected tothe circuit board (550) at a distal end or near the distal endregardless of integral formation or separation formation with the upperelastic member (450). Furthermore, the terminal unit (526) may be formedextended or bent as illustrated in FIG. 3.

The second coil (530) may be arranged to face the magnet (430) fixed atthe cover member (600). For example, the second coil (530) may bearranged at an external side of the magnet (430). According to thesecond exemplary embodiment, a total of four second coils (530) may beinstalled at four surfaces. However, the present disclosure is notlimited thereto, and only one for second direction and one for thirddirection may be installed, and four or more second coils may beinstalled. The second coil (530) may be formed by winding a wire in adoughnut-shape, and a start line and an end line of the second coil maybe conductively connected to a terminal formed on the circuit board(550).

The second coil (530) may be installed at an inner surface of thecircuit board (550) arranged at an inner side of the cover member (600).However, the present disclosure is not limited thereto, and the secondcoil (530) may be directly connected to an inner circumferential surfaceof the cover member (600), or may be formed on a separate substrate,where the substrate may be stacked on the circuit board (550).

The first detection sensor (560) configured to detect a z directionmovement may be arranged at a position opposite to a sensing magnet(400) of the circuit board (550). For example, when the sensing magnet(400) is installed at an upper surface of the bobbin (410), the firstdetection sensor (560) may be arranged at a position opposite to that ofthe sensing magnet (400) at an inner surface of a frame unit (550 a) ofthe circuit board (550, described later).

Referring to FIG. 19, at least one sensing magnet (400) configured todetect a z direction movement may be installed near to a corner area ofthe upper surface of the bobbin (410), where the first detection sensor(560) can detect a first direction movement of the first lens movingunit (100) by detecting changes in magnetic field in response toposition change of the sensing magnet (400). The first detection sensor(560) may be provided as a Hall sensor, and any sensor may be used forthe first detection sensor (560) as long as it can detect a change inmagnetic force. Furthermore, the installation position and the number ofthe first detection sensor (560) may be arranged to match to those ofthe sensing magnet (400).

The circuit board (550) may be coupled to an inner lateral surface ofthe cover member (600) and may include a frame unit (550 a) supported toan inner side of the cover member (600) and a substrate unit (550 b)mounted with the second coil (530). At this time, the at least one ofthe substrate units (550 b) may be provided as a terminal surface. Inthe second exemplary embodiment, the circuit board may be formed withtwo bent terminal surfaces. The terminal surface may be arranged with aplurality of terminals (551) to supply a current to the first and secondcoils (420, 530) by receiving an external power. The number of terminalsformed on the terminal surface may increase or decrease in response tothe types of elements necessary for control. Meantime, the PCB may bereplaced with an FPCB (Flexible PCB) according to the second exemplaryembodiment. The present disclosure however is not limited thereto, andthe terminal of the circuit board (550) may be directly formed on asurface of the base (510) by using a surface electrode method.

Furthermore, the circuit board (550) may be installed with a pad (notshown) conductively connected to the terminal unit (526) provided at thesupport member (520). This configuration enables the handshakecorrection by moving the housing (440) to the second and thirddirections through the interaction between the second coil (530) and themagnet (430).

The cover member (600) may be formed in an approximate shape of a box,and may encompass the first and second lens moving units (100, 500). Atthis time, as illustrated in FIG. 18, a second groove unit (610) isformed at a position opposite to that of the first groove part (511) ofthe base (510), whereby a groove unit of a predetermined area may beformed by coupling of the first and second groove parts (511, 610). Thegroove unit may be coated with an adhesive member having a viscosity.That is, the adhesive member coated on the groove unit can fill up a gapformed by opposite surfaces of the cover member (600) and the base (510)using the groove unit, whereby the cover member (600) and the base (510)may be coupled and sealed together.

Furthermore, a surface opposite to the terminal surface of the circuitboard (550) at the cover member (600) may be formed with a third grooveunit (620) to prevent interference with the plurality of terminals (551)formed at the terminal surface. The third groove unit (620) may beconcavely formed on an entire surface opposite to the terminal surface,and the adhesive member may be inwardly coated to seal the cover member(600), the base (510) and the circuit board (550).

Thus, according to the abovementioned configuration, the magnet (430)may be commonly shared to realize the auto focusing operation and thehandshake correction operation of the first and second lens moving units(400, 500) to reduce the number of parts and to enhance theresponsiveness by reducing the weight of the housing (440). Of course,an auto focusing magnet and a handshake correction magnet may beseparately formed. Furthermore, the support member (520) may beintegrally formed with the upper elastic member (450), and bent toreduce the weight and to enhance the assemblage. Furthermore, parts suchas the second coil (530) are modularized at an inner surface of thecover member (600) to simplify the assembly process.

The camera module according to the abovementioned second exemplaryembodiment of the present disclosure may include a lens moving unitcomprised of the first and second lens moving units (400, 500), a lensbarrel coupled to the bobbin (410), an image sensor and a PCB. At thistime, the PCB may be mounted with an image sensor to form a floorsurface of the camera module.

The bobbin (410) may include therein a lens barrel mounted with at leastone lens, where the lens barrel may be screw-connected to an innercircumferential surface of the bobbin (410). The present disclosure isnot limited thereto, albeit not being illustrated, and instead offorming a screw thread at an inner circumferential surface of the bobbin(410), the lens barrel may be directly fixed to an inside of the bobbin(410) by other methods than the screw connection. Alternatively, one ormore sheets of lenses may be integrally formed with the bobbin (410)free from the lens barrel. The optical system may be formed with onesheet of lens or two or more sheets of lenses coupled to the lensbarrel.

The base (410) may be additionally formed at a position opposite to thatof the image sensor with a UV cut-off filter, which may be coupled tothe cover member (600) and may support a bottom surface of the covermember (600). The base (410) may be mounted with a separate terminalmember for electrical conduction with the PCB, and a terminal may beintegrally formed using a surface electrode method. Meantime, the base(510) may function as a sensor holder to protect the image sensor, andin this case, a protrusion may be formed to a bottom side directionalong a lateral surface of the base (510). However, this is not anessential configuration, and albeit not illustrated, a separate sensorholder may be arranged at a bottom surface of the base (510) to performa function of the sensor holder.

The previous description of the present disclosure is provided to enableany person skilled in the art to make or use the inventive disclosure.Various modifications to the disclosure will be readily apparent tothose skilled in the art, and the generic principles defined herein maybe applied to other variations without departing from the spirit orscope of the disclosure. Thus, the present disclosure is not intended tolimit the examples described herein, but is to be accorded the widestscope consistent with the principles and novel features disclosedherein.

1. A lens moving unit, the lens moving unit comprising: a first lensmoving unit including a bobbin mounted at an inner side with at leastone lens and formed at a periphery with a first coil, and a housingconfigured to support a magnet arranged at a surrounding of the bobbinto move the bobbin and the first coil to a first direction parallel withan optical axis in response to interaction between the magnet and thefirst coil; and a second lens moving unit including a base spaced apartat a predetermined distance from the bobbin and the first lens movingunit, a support member configured to movably support the first lensmoving unit to second and third directions relative to the base and tosupply an electric power to the first coil, and a circuit boardincluding a detection sensor configured to detect positions of thesecond and third directions of the second lens moving unit relative to asecond coil and the base opposite to the magnet of the first lens movingunit to thereby move an entire first lens moving unit including thebobbin to the mutually different second and third directions which isperpendicular to the optical axis in response to the interaction betweenthe magnet and the second coil.
 2. The lens moving unit of claim 1,further comprising a cover member configured to encompass the first andsecond lens moving units by being coupled to the base.
 3. The lensmoving unit of claim 2, wherein the bobbin includes a first stopperprotrusively formed at an upper surface with a first height, and asecond stopper protrusively formed at a lateral surface of an uppersurface to a circumferential direction, wherein the first stopperprevents an inner surface of the cover member from colliding with abobbin body, and the second stopper prevents the bobbin from collidingwith the base.
 4. The lens moving unit of claim 2, wherein the housingincludes a first surface mounted with four magnets, a second surfaceconfigured to interconnect with the first surface and arranged with thesupport member, a third stopper protrusively formed from an uppersurface to prevent interference with the cover member, and a fourthstopper protrusively formed from a floor surface to prevent interferencewith the base.
 5. The lens moving unit of claim 4, wherein the secondsurface includes an escape groove to prevent the support member frominterfering with the housing.
 6. The lens moving unit of claim 5,wherein the second surface further includes a staircase unit formed atan upper side of the escape groove.
 7. The lens moving unit of claim 5,wherein the second surface further includes a diaphragm configured toaccommodate damping silicon.
 8. A lens moving unit, the lens moving unitcomprising: a first lens moving unit including a bobbin mounted at aninner side with at least one lens and formed at a periphery with a firstcoil, and a housing configured to support a magnet arranged at asurrounding of the bobbin to move the bobbin and the first coil to afirst direction parallel with an optical axis in response to interactionbetween the magnet and the first coil; a second lens moving unitincluding a base spaced apart at a predetermined distance from thehousing, a support member configured to movably support the first lensmoving unit to second and third directions relative to the base and tosupply an electric power to the first coil, a second coil arrangedopposite to the magnet of the first lens moving unit, and a circuitboard including a detection sensor configured to detect a position ofthe first direction of the housing relative to the base by detecting asensing magnet mounted on the first lens moving unit and changes inmagnetic field of the sensing magnet to thereby move the housing to themutually different second and third directions which is perpendicular tothe optical axis in response to the interaction between the magnet andthe second coil; and; a cover member configured to encompass the firstand second lens moving units by being coupled to the base.
 9. The lensmoving unit of claim 8 further comprising a second detection sensorconfigured to detect positions of the second and third directions. 10.The lens moving unit of claim 8, wherein the second coil includes aplurality of circuit boards coupled to an inner lateral wall of thecover member.
 11. The lens moving unit of claim 1, wherein the firstlens moving unit includes an octagonal bobbin having at least fourstraight surfaces and corner surfaces configured to connect the at leastfour straight surfaces, a first coil wound on a periphery of the bobbin,a magnet arranged at a position opposite to the straight surface of thefirst coil, a housing fixed by the magnet, and upper and bottom elasticmembers, an inner frame of which is coupled to the bobbin and an outerframe of which is coupled to the housing.
 12. The lens moving unit ofclaim 1, wherein the housing includes a recess groove having a sizecorresponding to that of the second stopper at a position opposite tothat of the second stopper.
 13. The lens moving unit of claim 1, whereinthe support member is integrally formed with the upper elastic member.14. The lens moving unit of claim 13, wherein the support memberincludes a connection unit connected to the upper elastic member, firstand second elastic deformation units extensively formed from theconnection unit, and a fixation unit fixedly coupled to the base. 15.The lens moving unit of claim 14, wherein at least four support membersare provided to support the second lens moving unit, and at least twosupport members further include terminal units each having a differentpolarity.
 16. The lens moving unit of claim 14, wherein the supportmember is interposed between the first and second elastic deformationunits and further includes a damping connection unit formed in a spaceformed by the diaphragm.
 17. The lens moving unit of claim 16, whereinupper side and bottom side shapes of the first and second elasticdeformation units mutually correspond, while the first and secondelastic deformation units are interposed between the damping connectionunit.
 18. The lens moving unit of claim 16, wherein each of the firstand second elastic deformation units takes a shape of a wire free frompattern.
 19. The lens moving unit of claim 1, wherein the fixation unitis wider than each width of the first and second elastic deformationunits.
 20. The lens moving unit of claim 1, wherein the base isconcavely formed with a support member recess groove at a positionopposite to that of the support member.
 21. The lens moving unit ofclaim 20, wherein the support member recess groove is formed at fourcorner areas of the base.
 22. The lens moving unit of claim 1, whereinthe second coil is formed at an upper surface of the circuit boardmounted at an upper side of the base.
 23. The lens moving unit of claim1, wherein the second coil is provided at an upper surface of thecircuit board mounted at an upper surface of the base with a substratehaving a pattern coil, and coupled to the circuit board in the form oflamination.
 24. The lens moving unit of claim 1, wherein the second coilis integrally formed at an upper surface of the base in the form of asurface electrode.
 25. The lens moving unit of claim 1, wherein thedetection sensor is any one of a Hall sensor aligned with a center ofthe second coil and insertedly coupled to a detection sensor recessgroove formed at the base and a photo reflector.
 26. The lens movingunit of claim 8, wherein a total of two detection sensors are provided,where each imaginary line connecting a center of the base to each centerof the detection sensors is perpendicularly arranged.
 27. The lensmoving unit of claim 8, wherein the magnet is dual-purposely used as anauto focusing magnet configured to move the bobbin to the firstdirection and as a handshake correction magnet configured to move thehousing to the second and third directions.
 28. The lens moving unit ofclaim 8, wherein the second coil is formed at an inner surface of thecircuit board mounted at an inner lateral surface of the cover member.29. The lens moving unit of claim 8, wherein the second coil is providedat an upper surface of the circuit board mounted at an inner lateralsurface of the cover member with a substrate having a pattern coil, andis coupled to the circuit board in the form of lamination.
 30. The lensmoving unit of claim 8, wherein the second coil is integrally formed atan inner lateral surface of the cover member in the form of a surfaceelectrode.
 31. The lens moving unit of claim 9, wherein the seconddetection sensor is any one of a Hall sensor aligned with a center ofthe second coil and insertedly coupled to a detection sensor recessgroove formed at the base and a photo reflector.
 32. The lens movingunit of claim 8, wherein the sensing magnet is arranged at an uppersurface of the first lens moving unit.
 33. The lens moving unit of claim32, wherein at least one sensing magnet is arranged at a corner area ofthe upper surface of the bobbin.
 34. A camera module, the camera modulecomprising: an image sensor; a PCB mounted with the image sensor; and alens moving unit in accordance with claim 1.